Oscillating aerating pipe



Sept. 10, 1929. K. IMHOFF 1,727,601

OSCILLATING AERATING PIPE Filed June 18/ 1927 Erna! Patented Sept. 10, v

UNITED STATES-PATENT OFFICE.

Application filed June 18, 1927. Serial No. 199,781.

To submerged contact aerators for sewage lubly mounted shaft that is motor-driven by treatment, compressed-air issupplied from atransmission gearing f. below, to make them capable of acting as a By the rotation of said driving pinion g, bacterial filter. For this purpose, a perfoit rolls along the toothed rack 72; while meshrated air supply pipe is used that is slowly. ing therewith and slides upon the guiding s5 oscillated below the aerator. race 70 thereby continuously reciprocating The present invention relates to improved Said frame 7, 70, which is guided during its means for suspending and-operating saidreciprocation between two stationary guidpipe in such a way that a perfectly uniform g ,Wfills By the I P M II f th distribution of the air supplied therethrough frame 51150 the tubular frame w 18 03011 over the whole bottom of the aerator is at lated in its ng Z and thereby the tained. supply pipe I) is continuously moved to and Th accompanying d i shows an. fro over the whole bottom of the aerator a. grammatically byway of example how the Y the P Q the 9116:1953 o h d 5 invention can be put into practice: Figs. 1 geanhg hgmeshlhg Wlhh the f g i l and 2 being respectively a side View partly 9 the r r e f the l ure we in section and a plan view of the contact 6 .takes Place m a Perfectly h y aerator submerged in an aeration tank and Wlthout. any Shocks 9 f i t of the Oscillating air supply pipe underneath ends of its strokes; thls be1ng1n connection with its accessories with the control valves e-essent1al for a o The supply pipe 1) lies below the bot perfectly uniform distribution. of the air tom of the aerator a and forms the lower g hgfi Over the Whole bottom of the part of a rectan ular tubular frame w surrounding the aerator and oscillati'ngly fi g igz g g g a i gfi g i mounted at its upper part in fixed'bearings g q y 0 e 0 e 86 from the air supply conduit 0. 2 above the middle of the aerator in such a It is immaterial Whether in the frame h, k

Way-that dunng reclprocahlon of .sald the toothed rack lies at the outer side and tubular frame a; the air supply pipe I) swings the guiding race at the inner Side thereof to and fro over the whole bottom of the (as illustrated) or Vice Versa SO aerator (see l hm f tuba Emphasis is to be laid upon the fact that frame 15 n at one end of lts upper the motion of the pipe I) is not harmonic but P there cohhected by mfiahs of a uniform beneath the bottom of the aerator P P d to the P p y a; that is to say the pipe b moves at sub 5 duit a. Control valves e in both lateral memstantiauy constant Speed f end to end .bers of the tubular frame a: serve for a uminto its travel, stopping quickly at the Sides form dlstrlbution of the air over the'whole f th t k d th revel-Sing Thi movelength 9 'P P ment is due to the action of the rack and T0 about the mlddle of the PP pinion. Hence no more air is supplied to one 40 her Q the tubular frame p 'f y pointbelow the bottom of the tank 2 than at ten lng arm y fixed and P s free any other and the air which rises through the end to a COIIDBCtIOII-IOd that 13 Integral. tank a is uniformly distributed through its with a laterally open frame comprising an t t endless toothed rack h and a likewise end- Wh t I l i i 45 less guiding race A: integraltherewith and 1. The combination with a submerged conparallel thereto, a drlving 111111011 9 eng gtact aerator for sewage treatment, of an air ing laterally into said frame k, k in such a supply pipe at the bottom thereof, and means way that it meshes with said toothed rack to oscillate said pipe at substantially'conwhile it is in loose contact with said guidstant speed from end to end of its travel be- 5o ing race. Said pinion g is keyed on a revoneath the whole-bottom of the aerator;

2., The combination with a submerged contact aerator for sewage treatment, and a rectangular tubular frame surrounding said aerator and at its upper part oscillatingly mounted above the aerator, the lower part of said tubular frame forming a perforated pipe to discharge air beneath the aerator.v

3. In a construction as specified in claim 2, means to oscillate said tubular frame and said air supply pipe at substantially constant speed from end to end of its travel over the whole bottom of the aerator.

4. lhe combination with a submerged contact aerator for sewagetreatment, a tubular frame surrounding the aerator and oscillatingly supported at points above the aerator, the lower part of the frame having perforations for the exit of air therefrom, c0nnections for supplying air to the interior of said frame to be discharged beneath the aerator, an arm projecting from the upper part of the frame, an operating rod joined to said arm, an endless toothed-rack carried by.

said arm, and a rotatable pinion engaging said rack to reciprocate the rod and rock said frame.

In testimony whereof I have hereunto set my hand.

' KARL IMHOFF. 

